1 /* $NetBSD: isakmp_base.c,v 1.7 2006/10/02 21:51:33 manu Exp $ */
2
3 /* $KAME: isakmp_base.c,v 1.49 2003/11/13 02:30:20 sakane Exp $ */
4
5 /*
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 /* Base Exchange (Base Mode) */
35
36 #include "config.h"
37
38 #include <sys/types.h>
39 #include <sys/param.h>
40
41 #include <stdlib.h>
42 #include <stdio.h>
43 #include <string.h>
44 #include <errno.h>
45 #if TIME_WITH_SYS_TIME
46 # include <sys/time.h>
47 # include <time.h>
48 #else
49 # if HAVE_SYS_TIME_H
50 # include <sys/time.h>
51 # else
52 # include <time.h>
53 # endif
54 #endif
55
56 #include "var.h"
57 #include "misc.h"
58 #include "vmbuf.h"
59 #include "plog.h"
60 #include "sockmisc.h"
61 #include "schedule.h"
62 #include "debug.h"
63
64 #ifdef ENABLE_HYBRID
65 #include <resolv.h>
66 #endif
67
68 #include "localconf.h"
69 #include "remoteconf.h"
70 #include "isakmp_var.h"
71 #include "isakmp.h"
72 #include "evt.h"
73 #include "oakley.h"
74 #include "handler.h"
75 #include "ipsec_doi.h"
76 #include "crypto_openssl.h"
77 #include "pfkey.h"
78 #include "isakmp_base.h"
79 #include "isakmp_inf.h"
80 #include "vendorid.h"
81 #ifdef ENABLE_NATT
82 #include "nattraversal.h"
83 #endif
84 #ifdef ENABLE_FRAG
85 #include "isakmp_frag.h"
86 #endif
87 #ifdef ENABLE_HYBRID
88 #include "isakmp_xauth.h"
89 #include "isakmp_cfg.h"
90 #endif
91
92 /* %%%
93 * begin Identity Protection Mode as initiator.
94 */
95 /*
96 * send to responder
97 * psk: HDR, SA, Idii, Ni_b
98 * sig: HDR, SA, Idii, Ni_b
99 * rsa: HDR, SA, [HASH(1),] <IDii_b>Pubkey_r, <Ni_b>Pubkey_r
100 * rev: HDR, SA, [HASH(1),] <Ni_b>Pubkey_r, <IDii_b>Ke_i
101 */
102 int
base_i1send(iph1,msg)103 base_i1send(iph1, msg)
104 struct ph1handle *iph1;
105 vchar_t *msg; /* must be null */
106 {
107 struct payload_list *plist = NULL;
108 int error = -1;
109 #ifdef ENABLE_NATT
110 vchar_t *vid_natt[MAX_NATT_VID_COUNT] = { NULL };
111 int i, vid_natt_i = 0;
112 #endif
113 #ifdef ENABLE_FRAG
114 vchar_t *vid_frag = NULL;
115 #endif
116 #ifdef ENABLE_HYBRID
117 vchar_t *vid_xauth = NULL;
118 vchar_t *vid_unity = NULL;
119 #endif
120 #ifdef ENABLE_DPD
121 vchar_t *vid_dpd = NULL;
122 #endif
123
124
125 /* validity check */
126 if (msg != NULL) {
127 plog(LLV_ERROR, LOCATION, NULL,
128 "msg has to be NULL in this function.\n");
129 goto end;
130 }
131 if (iph1->status != PHASE1ST_START) {
132 plog(LLV_ERROR, LOCATION, NULL,
133 "status mismatched %d.\n", iph1->status);
134 goto end;
135 }
136
137 /* create isakmp index */
138 memset(&iph1->index, 0, sizeof(iph1->index));
139 isakmp_newcookie((caddr_t)&iph1->index, iph1->remote, iph1->local);
140
141 /* make ID payload into isakmp status */
142 if (ipsecdoi_setid1(iph1) < 0)
143 goto end;
144
145 /* create SA payload for my proposal */
146 iph1->sa = ipsecdoi_setph1proposal(iph1->rmconf->proposal);
147 if (iph1->sa == NULL)
148 goto end;
149
150 /* generate NONCE value */
151 iph1->nonce = eay_set_random(iph1->rmconf->nonce_size);
152 if (iph1->nonce == NULL)
153 goto end;
154
155 #ifdef ENABLE_HYBRID
156 /* Do we need Xauth VID? */
157 switch (RMAUTHMETHOD(iph1)) {
158 case FICTIVE_AUTH_METHOD_XAUTH_PSKEY_I:
159 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I:
160 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I:
161 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I:
162 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I:
163 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I:
164 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I:
165 if ((vid_xauth = set_vendorid(VENDORID_XAUTH)) == NULL)
166 plog(LLV_ERROR, LOCATION, NULL,
167 "Xauth vendor ID generation failed\n");
168
169 if ((vid_unity = set_vendorid(VENDORID_UNITY)) == NULL)
170 plog(LLV_ERROR, LOCATION, NULL,
171 "Unity vendor ID generation failed\n");
172 break;
173 default:
174 break;
175 }
176 #endif
177 #ifdef ENABLE_FRAG
178 if (iph1->rmconf->ike_frag) {
179 vid_frag = set_vendorid(VENDORID_FRAG);
180 if (vid_frag != NULL)
181 vid_frag = isakmp_frag_addcap(vid_frag,
182 VENDORID_FRAG_BASE);
183 if (vid_frag == NULL)
184 plog(LLV_ERROR, LOCATION, NULL,
185 "Frag vendorID construction failed\n");
186 }
187 #endif
188 #ifdef ENABLE_NATT
189 /* Is NAT-T support allowed in the config file? */
190 if (iph1->rmconf->nat_traversal) {
191 /* Advertise NAT-T capability */
192 memset (vid_natt, 0, sizeof (vid_natt));
193 #ifdef VENDORID_NATT_00
194 if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_00)) != NULL)
195 vid_natt_i++;
196 #endif
197 #ifdef VENDORID_NATT_02
198 if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_02)) != NULL)
199 vid_natt_i++;
200 #endif
201 #ifdef VENDORID_NATT_02_N
202 if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_02_N)) != NULL)
203 vid_natt_i++;
204 #endif
205 #ifdef VENDORID_NATT_RFC
206 if ((vid_natt[vid_natt_i] = set_vendorid(VENDORID_NATT_RFC)) != NULL)
207 vid_natt_i++;
208 #endif
209 }
210 #endif
211
212 /* set SA payload to propose */
213 plist = isakmp_plist_append(plist, iph1->sa, ISAKMP_NPTYPE_SA);
214
215 /* create isakmp ID payload */
216 plist = isakmp_plist_append(plist, iph1->id, ISAKMP_NPTYPE_ID);
217
218 /* create isakmp NONCE payload */
219 plist = isakmp_plist_append(plist, iph1->nonce, ISAKMP_NPTYPE_NONCE);
220
221 #ifdef ENABLE_FRAG
222 if (vid_frag)
223 plist = isakmp_plist_append(plist, vid_frag, ISAKMP_NPTYPE_VID);
224 #endif
225 #ifdef ENABLE_HYBRID
226 if (vid_xauth)
227 plist = isakmp_plist_append(plist,
228 vid_xauth, ISAKMP_NPTYPE_VID);
229 if (vid_unity)
230 plist = isakmp_plist_append(plist,
231 vid_unity, ISAKMP_NPTYPE_VID);
232 #endif
233 #ifdef ENABLE_DPD
234 if (iph1->rmconf->dpd) {
235 vid_dpd = set_vendorid(VENDORID_DPD);
236 if (vid_dpd != NULL)
237 plist = isakmp_plist_append(plist, vid_dpd, ISAKMP_NPTYPE_VID);
238 }
239 #endif
240 #ifdef ENABLE_NATT
241 /* set VID payload for NAT-T */
242 for (i = 0; i < vid_natt_i; i++)
243 plist = isakmp_plist_append(plist, vid_natt[i], ISAKMP_NPTYPE_VID);
244 #endif
245 iph1->sendbuf = isakmp_plist_set_all (&plist, iph1);
246
247
248 #ifdef HAVE_PRINT_ISAKMP_C
249 isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
250 #endif
251
252 /* send the packet, add to the schedule to resend */
253 iph1->retry_counter = iph1->rmconf->retry_counter;
254 if (isakmp_ph1resend(iph1) == -1)
255 goto end;
256
257 iph1->status = PHASE1ST_MSG1SENT;
258
259 error = 0;
260
261 end:
262 #ifdef ENABLE_FRAG
263 if (vid_frag)
264 vfree(vid_frag);
265 #endif
266 #ifdef ENABLE_NATT
267 for (i = 0; i < vid_natt_i; i++)
268 vfree(vid_natt[i]);
269 #endif
270 #ifdef ENABLE_HYBRID
271 if (vid_xauth != NULL)
272 vfree(vid_xauth);
273 if (vid_unity != NULL)
274 vfree(vid_unity);
275 #endif
276 #ifdef ENABLE_DPD
277 if (vid_dpd != NULL)
278 vfree(vid_dpd);
279 #endif
280
281 return error;
282 }
283
284 /*
285 * receive from responder
286 * psk: HDR, SA, Idir, Nr_b
287 * sig: HDR, SA, Idir, Nr_b, [ CR ]
288 * rsa: HDR, SA, <IDir_b>PubKey_i, <Nr_b>PubKey_i
289 * rev: HDR, SA, <Nr_b>PubKey_i, <IDir_b>Ke_r
290 */
291 int
base_i2recv(iph1,msg)292 base_i2recv(iph1, msg)
293 struct ph1handle *iph1;
294 vchar_t *msg;
295 {
296 vchar_t *pbuf = NULL;
297 struct isakmp_parse_t *pa;
298 vchar_t *satmp = NULL;
299 int error = -1;
300 int vid_numeric;
301 #ifdef ENABLE_HYBRID
302 vchar_t *unity_vid;
303 vchar_t *xauth_vid;
304 #endif
305
306 /* validity check */
307 if (iph1->status != PHASE1ST_MSG1SENT) {
308 plog(LLV_ERROR, LOCATION, NULL,
309 "status mismatched %d.\n", iph1->status);
310 goto end;
311 }
312
313 /* validate the type of next payload */
314 pbuf = isakmp_parse(msg);
315 if (pbuf == NULL)
316 goto end;
317 pa = (struct isakmp_parse_t *)pbuf->v;
318
319 /* SA payload is fixed postion */
320 if (pa->type != ISAKMP_NPTYPE_SA) {
321 plog(LLV_ERROR, LOCATION, iph1->remote,
322 "received invalid next payload type %d, "
323 "expecting %d.\n",
324 pa->type, ISAKMP_NPTYPE_SA);
325 goto end;
326 }
327 if (isakmp_p2ph(&satmp, pa->ptr) < 0)
328 goto end;
329 pa++;
330
331 for (/*nothing*/;
332 pa->type != ISAKMP_NPTYPE_NONE;
333 pa++) {
334
335 switch (pa->type) {
336 case ISAKMP_NPTYPE_NONCE:
337 if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0)
338 goto end;
339 break;
340 case ISAKMP_NPTYPE_ID:
341 if (isakmp_p2ph(&iph1->id_p, pa->ptr) < 0)
342 goto end;
343 break;
344 case ISAKMP_NPTYPE_VID:
345 vid_numeric = check_vendorid(pa->ptr);
346 #ifdef ENABLE_NATT
347 if (iph1->rmconf->nat_traversal && natt_vendorid(vid_numeric))
348 natt_handle_vendorid(iph1, vid_numeric);
349 #endif
350 #ifdef ENABLE_HYBRID
351 switch (vid_numeric) {
352 case VENDORID_XAUTH:
353 iph1->mode_cfg->flags |=
354 ISAKMP_CFG_VENDORID_XAUTH;
355 break;
356
357 case VENDORID_UNITY:
358 iph1->mode_cfg->flags |=
359 ISAKMP_CFG_VENDORID_UNITY;
360 break;
361
362 default:
363 break;
364 }
365 #endif
366 #ifdef ENABLE_DPD
367 if (vid_numeric == VENDORID_DPD && iph1->rmconf->dpd) {
368 iph1->dpd_support=1;
369 plog(LLV_DEBUG, LOCATION, NULL,
370 "remote supports DPD\n");
371 }
372 #endif
373 break;
374 default:
375 /* don't send information, see ident_r1recv() */
376 plog(LLV_ERROR, LOCATION, iph1->remote,
377 "ignore the packet, "
378 "received unexpecting payload type %d.\n",
379 pa->type);
380 goto end;
381 }
382 }
383
384 if (iph1->nonce_p == NULL || iph1->id_p == NULL) {
385 plog(LLV_ERROR, LOCATION, iph1->remote,
386 "few isakmp message received.\n");
387 goto end;
388 }
389
390 /* verify identifier */
391 if (ipsecdoi_checkid1(iph1) != 0) {
392 plog(LLV_ERROR, LOCATION, iph1->remote,
393 "invalid ID payload.\n");
394 goto end;
395 }
396
397 #ifdef ENABLE_NATT
398 if (NATT_AVAILABLE(iph1))
399 plog(LLV_INFO, LOCATION, iph1->remote,
400 "Selected NAT-T version: %s\n",
401 vid_string_by_id(iph1->natt_options->version));
402 #endif
403
404 /* check SA payload and set approval SA for use */
405 if (ipsecdoi_checkph1proposal(satmp, iph1) < 0) {
406 plog(LLV_ERROR, LOCATION, iph1->remote,
407 "failed to get valid proposal.\n");
408 /* XXX send information */
409 goto end;
410 }
411 VPTRINIT(iph1->sa_ret);
412
413 iph1->status = PHASE1ST_MSG2RECEIVED;
414
415 error = 0;
416
417 end:
418 if (pbuf)
419 vfree(pbuf);
420 if (satmp)
421 vfree(satmp);
422
423 if (error) {
424 VPTRINIT(iph1->nonce_p);
425 VPTRINIT(iph1->id_p);
426 }
427
428 return error;
429 }
430
431 /*
432 * send to responder
433 * psk: HDR, KE, HASH_I
434 * sig: HDR, KE, [ CR, ] [CERT,] SIG_I
435 * rsa: HDR, KE, HASH_I
436 * rev: HDR, <KE>Ke_i, HASH_I
437 */
438 int
base_i2send(iph1,msg)439 base_i2send(iph1, msg)
440 struct ph1handle *iph1;
441 vchar_t *msg;
442 {
443 struct payload_list *plist = NULL;
444 vchar_t *vid = NULL;
445 int need_cert = 0;
446 int error = -1;
447
448 /* validity check */
449 if (iph1->status != PHASE1ST_MSG2RECEIVED) {
450 plog(LLV_ERROR, LOCATION, NULL,
451 "status mismatched %d.\n", iph1->status);
452 goto end;
453 }
454
455 /* fix isakmp index */
456 memcpy(&iph1->index.r_ck, &((struct isakmp *)msg->v)->r_ck,
457 sizeof(cookie_t));
458
459 /* generate DH public value */
460 if (oakley_dh_generate(iph1->approval->dhgrp,
461 &iph1->dhpub, &iph1->dhpriv) < 0)
462 goto end;
463
464 /* generate SKEYID to compute hash if not signature mode */
465 switch (AUTHMETHOD(iph1)) {
466 case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
467 case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
468 #ifdef ENABLE_HYBRID
469 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_I:
470 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I:
471 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I:
472 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I:
473 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I:
474 #endif
475 break;
476 default:
477 if (oakley_skeyid(iph1) < 0)
478 goto end;
479 break;
480 }
481
482 /* generate HASH to send */
483 plog(LLV_DEBUG, LOCATION, NULL, "generate HASH_I\n");
484 iph1->hash = oakley_ph1hash_base_i(iph1, GENERATE);
485 if (iph1->hash == NULL)
486 goto end;
487 switch (AUTHMETHOD(iph1)) {
488 case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
489 #ifdef ENABLE_HYBRID
490 case FICTIVE_AUTH_METHOD_XAUTH_PSKEY_I:
491 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I:
492 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I:
493 #endif
494 vid = set_vendorid(iph1->approval->vendorid);
495
496 /* create isakmp KE payload */
497 plist = isakmp_plist_append(plist, iph1->dhpub, ISAKMP_NPTYPE_KE);
498
499 /* create isakmp HASH payload */
500 plist = isakmp_plist_append(plist, iph1->hash, ISAKMP_NPTYPE_HASH);
501
502 /* append vendor id, if needed */
503 if (vid)
504 plist = isakmp_plist_append(plist, vid, ISAKMP_NPTYPE_VID);
505 break;
506 case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
507 case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
508 #ifdef ENABLE_HYBRID
509 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I:
510 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I:
511 #endif
512 /* XXX if there is CR or not ? */
513
514 if (oakley_getmycert(iph1) < 0)
515 goto end;
516
517 if (oakley_getsign(iph1) < 0)
518 goto end;
519
520 if (iph1->cert && iph1->rmconf->send_cert)
521 need_cert = 1;
522
523 /* create isakmp KE payload */
524 plist = isakmp_plist_append(plist,
525 iph1->dhpub, ISAKMP_NPTYPE_KE);
526
527 /* add CERT payload if there */
528 if (need_cert)
529 plist = isakmp_plist_append(plist,
530 iph1->cert->pl, ISAKMP_NPTYPE_CERT);
531
532 /* add SIG payload */
533 plist = isakmp_plist_append(plist,
534 iph1->sig, ISAKMP_NPTYPE_SIG);
535
536 break;
537 #ifdef HAVE_GSSAPI
538 case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
539 /* ... */
540 break;
541 #endif
542 case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
543 case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
544 #ifdef ENABLE_HYBRID
545 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I:
546 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I:
547 #endif
548 break;
549 }
550
551 #ifdef ENABLE_NATT
552 /* generate NAT-D payloads */
553 if (NATT_AVAILABLE(iph1))
554 {
555 vchar_t *natd[2] = { NULL, NULL };
556
557 plog (LLV_INFO, LOCATION, NULL, "Adding remote and local NAT-D payloads.\n");
558 if ((natd[0] = natt_hash_addr (iph1, iph1->remote)) == NULL) {
559 plog(LLV_ERROR, LOCATION, NULL,
560 "NAT-D hashing failed for %s\n", saddr2str(iph1->remote));
561 goto end;
562 }
563
564 if ((natd[1] = natt_hash_addr (iph1, iph1->local)) == NULL) {
565 plog(LLV_ERROR, LOCATION, NULL,
566 "NAT-D hashing failed for %s\n", saddr2str(iph1->local));
567 goto end;
568 }
569
570 plist = isakmp_plist_append(plist, natd[0], iph1->natt_options->payload_nat_d);
571 plist = isakmp_plist_append(plist, natd[1], iph1->natt_options->payload_nat_d);
572 }
573 #endif
574
575 iph1->sendbuf = isakmp_plist_set_all (&plist, iph1);
576
577 #ifdef HAVE_PRINT_ISAKMP_C
578 isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
579 #endif
580
581 /* send the packet, add to the schedule to resend */
582 iph1->retry_counter = iph1->rmconf->retry_counter;
583 if (isakmp_ph1resend(iph1) == -1)
584 goto end;
585
586 /* the sending message is added to the received-list. */
587 if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
588 plog(LLV_ERROR , LOCATION, NULL,
589 "failed to add a response packet to the tree.\n");
590 goto end;
591 }
592
593 iph1->status = PHASE1ST_MSG2SENT;
594
595 error = 0;
596
597 end:
598 if (vid)
599 vfree(vid);
600 return error;
601 }
602
603 /*
604 * receive from responder
605 * psk: HDR, KE, HASH_R
606 * sig: HDR, KE, [CERT,] SIG_R
607 * rsa: HDR, KE, HASH_R
608 * rev: HDR, <KE>_Ke_r, HASH_R
609 */
610 int
base_i3recv(iph1,msg)611 base_i3recv(iph1, msg)
612 struct ph1handle *iph1;
613 vchar_t *msg;
614 {
615 vchar_t *pbuf = NULL;
616 struct isakmp_parse_t *pa;
617 int error = -1;
618 int ptype;
619 #ifdef ENABLE_NATT
620 vchar_t *natd_received;
621 int natd_seq = 0, natd_verified;
622 #endif
623
624 /* validity check */
625 if (iph1->status != PHASE1ST_MSG2SENT) {
626 plog(LLV_ERROR, LOCATION, NULL,
627 "status mismatched %d.\n", iph1->status);
628 goto end;
629 }
630
631 /* validate the type of next payload */
632 pbuf = isakmp_parse(msg);
633 if (pbuf == NULL)
634 goto end;
635
636 for (pa = (struct isakmp_parse_t *)pbuf->v;
637 pa->type != ISAKMP_NPTYPE_NONE;
638 pa++) {
639
640 switch (pa->type) {
641 case ISAKMP_NPTYPE_KE:
642 if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0)
643 goto end;
644 break;
645 case ISAKMP_NPTYPE_HASH:
646 iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr;
647 break;
648 case ISAKMP_NPTYPE_CERT:
649 if (oakley_savecert(iph1, pa->ptr) < 0)
650 goto end;
651 break;
652 case ISAKMP_NPTYPE_SIG:
653 if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0)
654 goto end;
655 break;
656 case ISAKMP_NPTYPE_VID:
657 (void)check_vendorid(pa->ptr);
658 break;
659
660 #ifdef ENABLE_NATT
661 case ISAKMP_NPTYPE_NATD_DRAFT:
662 case ISAKMP_NPTYPE_NATD_RFC:
663 if (NATT_AVAILABLE(iph1) && iph1->natt_options &&
664 pa->type == iph1->natt_options->payload_nat_d) {
665 natd_received = NULL;
666 if (isakmp_p2ph (&natd_received, pa->ptr) < 0)
667 goto end;
668
669 /* set both bits first so that we can clear them
670 upon verifying hashes */
671 if (natd_seq == 0)
672 iph1->natt_flags |= NAT_DETECTED;
673
674 /* this function will clear appropriate bits bits
675 from iph1->natt_flags */
676 natd_verified = natt_compare_addr_hash (iph1,
677 natd_received, natd_seq++);
678
679 plog (LLV_INFO, LOCATION, NULL, "NAT-D payload #%d %s\n",
680 natd_seq - 1,
681 natd_verified ? "verified" : "doesn't match");
682
683 vfree (natd_received);
684 break;
685 }
686 /* passthrough to default... */
687 #endif
688
689 default:
690 /* don't send information, see ident_r1recv() */
691 plog(LLV_ERROR, LOCATION, iph1->remote,
692 "ignore the packet, "
693 "received unexpecting payload type %d.\n",
694 pa->type);
695 goto end;
696 }
697 }
698
699 #ifdef ENABLE_NATT
700 if (NATT_AVAILABLE(iph1)) {
701 plog (LLV_INFO, LOCATION, NULL, "NAT %s %s%s\n",
702 iph1->natt_flags & NAT_DETECTED ?
703 "detected:" : "not detected",
704 iph1->natt_flags & NAT_DETECTED_ME ? "ME " : "",
705 iph1->natt_flags & NAT_DETECTED_PEER ? "PEER" : "");
706 if (iph1->natt_flags & NAT_DETECTED)
707 natt_float_ports (iph1);
708 }
709 #endif
710
711 /* payload existency check */
712 /* validate authentication value */
713 ptype = oakley_validate_auth(iph1);
714 if (ptype != 0) {
715 if (ptype == -1) {
716 /* message printed inner oakley_validate_auth() */
717 goto end;
718 }
719 EVT_PUSH(iph1->local, iph1->remote,
720 EVTT_PEERPH1AUTH_FAILED, NULL);
721 isakmp_info_send_n1(iph1, ptype, NULL);
722 goto end;
723 }
724
725 /* compute sharing secret of DH */
726 if (oakley_dh_compute(iph1->approval->dhgrp, iph1->dhpub,
727 iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0)
728 goto end;
729
730 /* generate SKEYID to compute hash if signature mode */
731 switch (AUTHMETHOD(iph1)) {
732 case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
733 case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
734 #ifdef ENABLE_HYBRID
735 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_I:
736 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I:
737 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I:
738 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I:
739 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I:
740 #endif
741 if (oakley_skeyid(iph1) < 0)
742 goto end;
743 break;
744 default:
745 break;
746 }
747
748 /* generate SKEYIDs & IV & final cipher key */
749 if (oakley_skeyid_dae(iph1) < 0)
750 goto end;
751 if (oakley_compute_enckey(iph1) < 0)
752 goto end;
753 if (oakley_newiv(iph1) < 0)
754 goto end;
755
756 /* see handler.h about IV synchronization. */
757 memcpy(iph1->ivm->iv->v, iph1->ivm->ive->v, iph1->ivm->iv->l);
758
759 /* set encryption flag */
760 iph1->flags |= ISAKMP_FLAG_E;
761
762 iph1->status = PHASE1ST_MSG3RECEIVED;
763
764 error = 0;
765
766 end:
767 if (pbuf)
768 vfree(pbuf);
769
770 if (error) {
771 VPTRINIT(iph1->dhpub_p);
772 oakley_delcert(iph1->cert_p);
773 iph1->cert_p = NULL;
774 oakley_delcert(iph1->crl_p);
775 iph1->crl_p = NULL;
776 VPTRINIT(iph1->sig_p);
777 }
778
779 return error;
780 }
781
782 /*
783 * status update and establish isakmp sa.
784 */
785 int
base_i3send(iph1,msg)786 base_i3send(iph1, msg)
787 struct ph1handle *iph1;
788 vchar_t *msg;
789 {
790 int error = -1;
791
792 /* validity check */
793 if (iph1->status != PHASE1ST_MSG3RECEIVED) {
794 plog(LLV_ERROR, LOCATION, NULL,
795 "status mismatched %d.\n", iph1->status);
796 goto end;
797 }
798
799 iph1->status = PHASE1ST_ESTABLISHED;
800
801 error = 0;
802
803 end:
804 return error;
805 }
806
807 /*
808 * receive from initiator
809 * psk: HDR, SA, Idii, Ni_b
810 * sig: HDR, SA, Idii, Ni_b
811 * rsa: HDR, SA, [HASH(1),] <IDii_b>Pubkey_r, <Ni_b>Pubkey_r
812 * rev: HDR, SA, [HASH(1),] <Ni_b>Pubkey_r, <IDii_b>Ke_i
813 */
814 int
base_r1recv(iph1,msg)815 base_r1recv(iph1, msg)
816 struct ph1handle *iph1;
817 vchar_t *msg;
818 {
819 vchar_t *pbuf = NULL;
820 struct isakmp_parse_t *pa;
821 int error = -1;
822 int vid_numeric;
823
824 /* validity check */
825 if (iph1->status != PHASE1ST_START) {
826 plog(LLV_ERROR, LOCATION, NULL,
827 "status mismatched %d.\n", iph1->status);
828 goto end;
829 }
830
831 /* validate the type of next payload */
832 /*
833 * NOTE: XXX even if multiple VID, we'll silently ignore those.
834 */
835 pbuf = isakmp_parse(msg);
836 if (pbuf == NULL)
837 goto end;
838 pa = (struct isakmp_parse_t *)pbuf->v;
839
840 /* check the position of SA payload */
841 if (pa->type != ISAKMP_NPTYPE_SA) {
842 plog(LLV_ERROR, LOCATION, iph1->remote,
843 "received invalid next payload type %d, "
844 "expecting %d.\n",
845 pa->type, ISAKMP_NPTYPE_SA);
846 goto end;
847 }
848 if (isakmp_p2ph(&iph1->sa, pa->ptr) < 0)
849 goto end;
850 pa++;
851
852 for (/*nothing*/;
853 pa->type != ISAKMP_NPTYPE_NONE;
854 pa++) {
855
856 switch (pa->type) {
857 case ISAKMP_NPTYPE_NONCE:
858 if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0)
859 goto end;
860 break;
861 case ISAKMP_NPTYPE_ID:
862 if (isakmp_p2ph(&iph1->id_p, pa->ptr) < 0)
863 goto end;
864 break;
865 case ISAKMP_NPTYPE_VID:
866 vid_numeric = check_vendorid(pa->ptr);
867 #ifdef ENABLE_NATT
868 if (iph1->rmconf->nat_traversal && natt_vendorid(vid_numeric))
869 natt_handle_vendorid(iph1, vid_numeric);
870 #endif
871 #ifdef ENABLE_FRAG
872 if ((vid_numeric == VENDORID_FRAG) &&
873 (vendorid_frag_cap(pa->ptr) & VENDORID_FRAG_BASE))
874 iph1->frag = 1;
875 #endif
876 #ifdef ENABLE_HYBRID
877 switch (vid_numeric) {
878 case VENDORID_XAUTH:
879 iph1->mode_cfg->flags |=
880 ISAKMP_CFG_VENDORID_XAUTH;
881 break;
882
883 case VENDORID_UNITY:
884 iph1->mode_cfg->flags |=
885 ISAKMP_CFG_VENDORID_UNITY;
886 break;
887
888 default:
889 break;
890 }
891 #endif
892 #ifdef ENABLE_DPD
893 if (vid_numeric == VENDORID_DPD && iph1->rmconf->dpd) {
894 iph1->dpd_support=1;
895 plog(LLV_DEBUG, LOCATION, NULL,
896 "remote supports DPD\n");
897 }
898 #endif
899 break;
900 default:
901 /* don't send information, see ident_r1recv() */
902 plog(LLV_ERROR, LOCATION, iph1->remote,
903 "ignore the packet, "
904 "received unexpecting payload type %d.\n",
905 pa->type);
906 goto end;
907 }
908 }
909
910 if (iph1->nonce_p == NULL || iph1->id_p == NULL) {
911 plog(LLV_ERROR, LOCATION, iph1->remote,
912 "few isakmp message received.\n");
913 goto end;
914 }
915
916 /* verify identifier */
917 if (ipsecdoi_checkid1(iph1) != 0) {
918 plog(LLV_ERROR, LOCATION, iph1->remote,
919 "invalid ID payload.\n");
920 goto end;
921 }
922
923 #ifdef ENABLE_NATT
924 if (NATT_AVAILABLE(iph1))
925 plog(LLV_INFO, LOCATION, iph1->remote,
926 "Selected NAT-T version: %s\n",
927 vid_string_by_id(iph1->natt_options->version));
928 #endif
929
930 /* check SA payload and set approval SA for use */
931 if (ipsecdoi_checkph1proposal(iph1->sa, iph1) < 0) {
932 plog(LLV_ERROR, LOCATION, iph1->remote,
933 "failed to get valid proposal.\n");
934 /* XXX send information */
935 goto end;
936 }
937
938 iph1->status = PHASE1ST_MSG1RECEIVED;
939
940 error = 0;
941
942 end:
943 if (pbuf)
944 vfree(pbuf);
945
946 if (error) {
947 VPTRINIT(iph1->sa);
948 VPTRINIT(iph1->nonce_p);
949 VPTRINIT(iph1->id_p);
950 }
951
952 return error;
953 }
954
955 /*
956 * send to initiator
957 * psk: HDR, SA, Idir, Nr_b
958 * sig: HDR, SA, Idir, Nr_b, [ CR ]
959 * rsa: HDR, SA, <IDir_b>PubKey_i, <Nr_b>PubKey_i
960 * rev: HDR, SA, <Nr_b>PubKey_i, <IDir_b>Ke_r
961 */
962 int
base_r1send(iph1,msg)963 base_r1send(iph1, msg)
964 struct ph1handle *iph1;
965 vchar_t *msg;
966 {
967 struct payload_list *plist = NULL;
968 int error = -1;
969 #ifdef ENABLE_NATT
970 vchar_t *vid_natt = NULL;
971 #endif
972 #ifdef ENABLE_HYBRID
973 vchar_t *vid_xauth = NULL;
974 vchar_t *vid_unity = NULL;
975 #endif
976 #ifdef ENABLE_FRAG
977 vchar_t *vid_frag = NULL;
978 #endif
979 #ifdef ENABLE_DPD
980 vchar_t *vid_dpd = NULL;
981 #endif
982
983 /* validity check */
984 if (iph1->status != PHASE1ST_MSG1RECEIVED) {
985 plog(LLV_ERROR, LOCATION, NULL,
986 "status mismatched %d.\n", iph1->status);
987 goto end;
988 }
989
990 /* set responder's cookie */
991 isakmp_newcookie((caddr_t)&iph1->index.r_ck, iph1->remote, iph1->local);
992
993 /* make ID payload into isakmp status */
994 if (ipsecdoi_setid1(iph1) < 0)
995 goto end;
996
997 /* generate NONCE value */
998 iph1->nonce = eay_set_random(iph1->rmconf->nonce_size);
999 if (iph1->nonce == NULL)
1000 goto end;
1001
1002 /* set SA payload to reply */
1003 plist = isakmp_plist_append(plist, iph1->sa_ret, ISAKMP_NPTYPE_SA);
1004
1005 /* create isakmp ID payload */
1006 plist = isakmp_plist_append(plist, iph1->id, ISAKMP_NPTYPE_ID);
1007
1008 /* create isakmp NONCE payload */
1009 plist = isakmp_plist_append(plist, iph1->nonce, ISAKMP_NPTYPE_NONCE);
1010
1011 #ifdef ENABLE_NATT
1012 /* has the peer announced nat-t? */
1013 if (NATT_AVAILABLE(iph1))
1014 vid_natt = set_vendorid(iph1->natt_options->version);
1015 if (vid_natt)
1016 plist = isakmp_plist_append(plist, vid_natt, ISAKMP_NPTYPE_VID);
1017 #endif
1018 #ifdef ENABLE_HYBRID
1019 if (iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_XAUTH) {
1020 plog (LLV_INFO, LOCATION, NULL, "Adding xauth VID payload.\n");
1021 if ((vid_xauth = set_vendorid(VENDORID_XAUTH)) == NULL) {
1022 plog(LLV_ERROR, LOCATION, NULL,
1023 "Cannot create Xauth vendor ID\n");
1024 goto end;
1025 }
1026 plist = isakmp_plist_append(plist,
1027 vid_xauth, ISAKMP_NPTYPE_VID);
1028 }
1029
1030 if (iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_UNITY) {
1031 if ((vid_unity = set_vendorid(VENDORID_UNITY)) == NULL) {
1032 plog(LLV_ERROR, LOCATION, NULL,
1033 "Cannot create Unity vendor ID\n");
1034 goto end;
1035 }
1036 plist = isakmp_plist_append(plist,
1037 vid_unity, ISAKMP_NPTYPE_VID);
1038 }
1039 #endif
1040 #ifdef ENABLE_DPD
1041 /*
1042 * Only send DPD support if remote announced DPD
1043 * and if DPD support is active
1044 */
1045 if (iph1->dpd_support && iph1->rmconf->dpd) {
1046 if ((vid_dpd = set_vendorid(VENDORID_DPD)) == NULL) {
1047 plog(LLV_ERROR, LOCATION, NULL,
1048 "DPD vendorID construction failed\n");
1049 } else {
1050 plist = isakmp_plist_append(plist, vid_dpd,
1051 ISAKMP_NPTYPE_VID);
1052 }
1053 }
1054 #endif
1055 #ifdef ENABLE_FRAG
1056 if (iph1->rmconf->ike_frag) {
1057 if ((vid_frag = set_vendorid(VENDORID_FRAG)) == NULL) {
1058 plog(LLV_ERROR, LOCATION, NULL,
1059 "Frag vendorID construction failed\n");
1060 } else {
1061 vid_frag = isakmp_frag_addcap(vid_frag,
1062 VENDORID_FRAG_BASE);
1063 plist = isakmp_plist_append(plist,
1064 vid_frag, ISAKMP_NPTYPE_VID);
1065 }
1066 }
1067 #endif
1068
1069 iph1->sendbuf = isakmp_plist_set_all (&plist, iph1);
1070
1071 #ifdef HAVE_PRINT_ISAKMP_C
1072 isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
1073 #endif
1074
1075 /* send the packet, add to the schedule to resend */
1076 iph1->retry_counter = iph1->rmconf->retry_counter;
1077 if (isakmp_ph1resend(iph1) == -1) {
1078 iph1 = NULL;
1079 goto end;
1080 }
1081
1082 /* the sending message is added to the received-list. */
1083 if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
1084 plog(LLV_ERROR , LOCATION, NULL,
1085 "failed to add a response packet to the tree.\n");
1086 goto end;
1087 }
1088
1089 iph1->status = PHASE1ST_MSG1SENT;
1090
1091 error = 0;
1092
1093 end:
1094 #ifdef ENABLE_NATT
1095 if (vid_natt)
1096 vfree(vid_natt);
1097 #endif
1098 #ifdef ENABLE_HYBRID
1099 if (vid_xauth != NULL)
1100 vfree(vid_xauth);
1101 if (vid_unity != NULL)
1102 vfree(vid_unity);
1103 #endif
1104 #ifdef ENABLE_FRAG
1105 if (vid_frag)
1106 vfree(vid_frag);
1107 #endif
1108 #ifdef ENABLE_DPD
1109 if (vid_dpd)
1110 vfree(vid_dpd);
1111 #endif
1112
1113 if (iph1 != NULL)
1114 VPTRINIT(iph1->sa_ret);
1115
1116 return error;
1117 }
1118
1119 /*
1120 * receive from initiator
1121 * psk: HDR, KE, HASH_I
1122 * sig: HDR, KE, [ CR, ] [CERT,] SIG_I
1123 * rsa: HDR, KE, HASH_I
1124 * rev: HDR, <KE>Ke_i, HASH_I
1125 */
1126 int
base_r2recv(iph1,msg)1127 base_r2recv(iph1, msg)
1128 struct ph1handle *iph1;
1129 vchar_t *msg;
1130 {
1131 vchar_t *pbuf = NULL;
1132 struct isakmp_parse_t *pa;
1133 int error = -1;
1134 int ptype;
1135 #ifdef ENABLE_NATT
1136 int natd_seq = 0;
1137 #endif
1138
1139 /* validity check */
1140 if (iph1->status != PHASE1ST_MSG1SENT) {
1141 plog(LLV_ERROR, LOCATION, NULL,
1142 "status mismatched %d.\n", iph1->status);
1143 goto end;
1144 }
1145
1146 /* validate the type of next payload */
1147 pbuf = isakmp_parse(msg);
1148 if (pbuf == NULL)
1149 goto end;
1150
1151 iph1->pl_hash = NULL;
1152
1153 for (pa = (struct isakmp_parse_t *)pbuf->v;
1154 pa->type != ISAKMP_NPTYPE_NONE;
1155 pa++) {
1156
1157 switch (pa->type) {
1158 case ISAKMP_NPTYPE_KE:
1159 if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0)
1160 goto end;
1161 break;
1162 case ISAKMP_NPTYPE_HASH:
1163 iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr;
1164 break;
1165 case ISAKMP_NPTYPE_CERT:
1166 if (oakley_savecert(iph1, pa->ptr) < 0)
1167 goto end;
1168 break;
1169 case ISAKMP_NPTYPE_SIG:
1170 if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0)
1171 goto end;
1172 break;
1173 case ISAKMP_NPTYPE_VID:
1174 (void)check_vendorid(pa->ptr);
1175 break;
1176
1177 #ifdef ENABLE_NATT
1178 case ISAKMP_NPTYPE_NATD_DRAFT:
1179 case ISAKMP_NPTYPE_NATD_RFC:
1180 if (pa->type == iph1->natt_options->payload_nat_d)
1181 {
1182 vchar_t *natd_received = NULL;
1183 int natd_verified;
1184
1185 if (isakmp_p2ph (&natd_received, pa->ptr) < 0)
1186 goto end;
1187
1188 if (natd_seq == 0)
1189 iph1->natt_flags |= NAT_DETECTED;
1190
1191 natd_verified = natt_compare_addr_hash (iph1,
1192 natd_received, natd_seq++);
1193
1194 plog (LLV_INFO, LOCATION, NULL, "NAT-D payload #%d %s\n",
1195 natd_seq - 1,
1196 natd_verified ? "verified" : "doesn't match");
1197
1198 vfree (natd_received);
1199 break;
1200 }
1201 /* passthrough to default... */
1202 #endif
1203
1204 default:
1205 /* don't send information, see ident_r1recv() */
1206 plog(LLV_ERROR, LOCATION, iph1->remote,
1207 "ignore the packet, "
1208 "received unexpecting payload type %d.\n",
1209 pa->type);
1210 goto end;
1211 }
1212 }
1213
1214 /* generate DH public value */
1215 if (oakley_dh_generate(iph1->approval->dhgrp,
1216 &iph1->dhpub, &iph1->dhpriv) < 0)
1217 goto end;
1218
1219 /* compute sharing secret of DH */
1220 if (oakley_dh_compute(iph1->approval->dhgrp, iph1->dhpub,
1221 iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0)
1222 goto end;
1223
1224 /* generate SKEYID */
1225 if (oakley_skeyid(iph1) < 0)
1226 goto end;
1227
1228 #ifdef ENABLE_NATT
1229 if (NATT_AVAILABLE(iph1))
1230 plog (LLV_INFO, LOCATION, NULL, "NAT %s %s%s\n",
1231 iph1->natt_flags & NAT_DETECTED ?
1232 "detected:" : "not detected",
1233 iph1->natt_flags & NAT_DETECTED_ME ? "ME " : "",
1234 iph1->natt_flags & NAT_DETECTED_PEER ? "PEER" : "");
1235 #endif
1236
1237 /* payload existency check */
1238 /* validate authentication value */
1239 ptype = oakley_validate_auth(iph1);
1240 if (ptype != 0) {
1241 if (ptype == -1) {
1242 /* message printed inner oakley_validate_auth() */
1243 goto end;
1244 }
1245 EVT_PUSH(iph1->local, iph1->remote,
1246 EVTT_PEERPH1AUTH_FAILED, NULL);
1247 isakmp_info_send_n1(iph1, ptype, NULL);
1248 goto end;
1249 }
1250
1251 iph1->status = PHASE1ST_MSG2RECEIVED;
1252
1253 error = 0;
1254
1255 end:
1256 if (pbuf)
1257 vfree(pbuf);
1258
1259 if (error) {
1260 VPTRINIT(iph1->dhpub_p);
1261 oakley_delcert(iph1->cert_p);
1262 iph1->cert_p = NULL;
1263 oakley_delcert(iph1->crl_p);
1264 iph1->crl_p = NULL;
1265 VPTRINIT(iph1->sig_p);
1266 }
1267
1268 return error;
1269 }
1270
1271 /*
1272 * send to initiator
1273 * psk: HDR, KE, HASH_R
1274 * sig: HDR, KE, [CERT,] SIG_R
1275 * rsa: HDR, KE, HASH_R
1276 * rev: HDR, <KE>_Ke_r, HASH_R
1277 */
1278 int
base_r2send(iph1,msg)1279 base_r2send(iph1, msg)
1280 struct ph1handle *iph1;
1281 vchar_t *msg;
1282 {
1283 struct payload_list *plist = NULL;
1284 vchar_t *vid = NULL;
1285 int need_cert = 0;
1286 int error = -1;
1287
1288 /* validity check */
1289 if (iph1->status != PHASE1ST_MSG2RECEIVED) {
1290 plog(LLV_ERROR, LOCATION, NULL,
1291 "status mismatched %d.\n", iph1->status);
1292 goto end;
1293 }
1294
1295 /* generate HASH to send */
1296 plog(LLV_DEBUG, LOCATION, NULL, "generate HASH_I\n");
1297 switch (AUTHMETHOD(iph1)) {
1298 case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
1299 #ifdef ENABLE_HYBRID
1300 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_R:
1301 #endif
1302 case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
1303 case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
1304 #ifdef ENABLE_HYBRID
1305 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_R:
1306 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_R:
1307 #endif
1308 iph1->hash = oakley_ph1hash_common(iph1, GENERATE);
1309 break;
1310 case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
1311 case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
1312 #ifdef ENABLE_HYBRID
1313 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R:
1314 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R:
1315 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R:
1316 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R:
1317 #endif
1318 #ifdef HAVE_GSSAPI
1319 case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
1320 #endif
1321 iph1->hash = oakley_ph1hash_base_r(iph1, GENERATE);
1322 break;
1323 default:
1324 plog(LLV_ERROR, LOCATION, NULL,
1325 "invalid authentication method %d\n",
1326 iph1->approval->authmethod);
1327 goto end;
1328 }
1329 if (iph1->hash == NULL)
1330 goto end;
1331
1332 switch (AUTHMETHOD(iph1)) {
1333 case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
1334 #ifdef ENABLE_HYBRID
1335 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_R:
1336 #endif
1337 vid = set_vendorid(iph1->approval->vendorid);
1338
1339 /* create isakmp KE payload */
1340 plist = isakmp_plist_append(plist,
1341 iph1->dhpub, ISAKMP_NPTYPE_KE);
1342
1343 /* create isakmp HASH payload */
1344 plist = isakmp_plist_append(plist,
1345 iph1->hash, ISAKMP_NPTYPE_HASH);
1346
1347 /* append vendor id, if needed */
1348 if (vid)
1349 plist = isakmp_plist_append(plist,
1350 vid, ISAKMP_NPTYPE_VID);
1351 break;
1352 case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
1353 case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
1354 #ifdef ENABLE_HYBRID
1355 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R:
1356 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R:
1357 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R:
1358 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R:
1359 #endif
1360 /* XXX if there is CR or not ? */
1361
1362 if (oakley_getmycert(iph1) < 0)
1363 goto end;
1364
1365 if (oakley_getsign(iph1) < 0)
1366 goto end;
1367
1368 if (iph1->cert && iph1->rmconf->send_cert)
1369 need_cert = 1;
1370
1371 /* create isakmp KE payload */
1372 plist = isakmp_plist_append(plist,
1373 iph1->dhpub, ISAKMP_NPTYPE_KE);
1374
1375 /* add CERT payload if there */
1376 if (need_cert)
1377 plist = isakmp_plist_append(plist,
1378 iph1->cert->pl, ISAKMP_NPTYPE_CERT);
1379 /* add SIG payload */
1380 plist = isakmp_plist_append(plist,
1381 iph1->sig, ISAKMP_NPTYPE_SIG);
1382 break;
1383 #ifdef HAVE_GSSAPI
1384 case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
1385 /* ... */
1386 break;
1387 #endif
1388 case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
1389 case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
1390 #ifdef ENABLE_HYBRID
1391 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_R:
1392 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_R:
1393 #endif
1394 break;
1395 }
1396
1397 #ifdef ENABLE_NATT
1398 /* generate NAT-D payloads */
1399 if (NATT_AVAILABLE(iph1)) {
1400 vchar_t *natd[2] = { NULL, NULL };
1401
1402 plog(LLV_INFO, LOCATION,
1403 NULL, "Adding remote and local NAT-D payloads.\n");
1404 if ((natd[0] = natt_hash_addr(iph1, iph1->remote)) == NULL) {
1405 plog(LLV_ERROR, LOCATION, NULL,
1406 "NAT-D hashing failed for %s\n",
1407 saddr2str(iph1->remote));
1408 goto end;
1409 }
1410
1411 if ((natd[1] = natt_hash_addr(iph1, iph1->local)) == NULL) {
1412 plog(LLV_ERROR, LOCATION, NULL,
1413 "NAT-D hashing failed for %s\n",
1414 saddr2str(iph1->local));
1415 goto end;
1416 }
1417
1418 plist = isakmp_plist_append(plist,
1419 natd[0], iph1->natt_options->payload_nat_d);
1420 plist = isakmp_plist_append(plist,
1421 natd[1], iph1->natt_options->payload_nat_d);
1422 }
1423 #endif
1424
1425 iph1->sendbuf = isakmp_plist_set_all(&plist, iph1);
1426
1427 #ifdef HAVE_PRINT_ISAKMP_C
1428 isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
1429 #endif
1430
1431 /* send HDR;KE;NONCE to responder */
1432 if (isakmp_send(iph1, iph1->sendbuf) < 0)
1433 goto end;
1434
1435 /* the sending message is added to the received-list. */
1436 if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
1437 plog(LLV_ERROR , LOCATION, NULL,
1438 "failed to add a response packet to the tree.\n");
1439 goto end;
1440 }
1441
1442 /* generate SKEYIDs & IV & final cipher key */
1443 if (oakley_skeyid_dae(iph1) < 0)
1444 goto end;
1445 if (oakley_compute_enckey(iph1) < 0)
1446 goto end;
1447 if (oakley_newiv(iph1) < 0)
1448 goto end;
1449
1450 /* set encryption flag */
1451 iph1->flags |= ISAKMP_FLAG_E;
1452
1453 iph1->status = PHASE1ST_ESTABLISHED;
1454
1455 error = 0;
1456
1457 end:
1458 if (vid)
1459 vfree(vid);
1460 return error;
1461 }
1462